Hitachi C20 Lc880snt Service Manual

							- 38 -INFORMATION OF ICS
IC GM5221 PQFP-208 (Miscellaneous)
Pin No.
   Pin Name Description
    1 ROM-DATA3 External ROM DATA3
    2 ROM-DATA2 External ROM DATA2
    3 ROM-DATA1 External ROM DATA1
    4 ROM-DATA0 External ROM DATA0
    5 ROM-OEn External ROM Output Enable
    6 ROM-WEn External ROM Write Enable
    7 ROM-CSN External ROM Crip Select Enable
8,42,51, CRVSS Ground for cord power
74,76,87,
94,97,
140,180
9,41,75, CVDD_18 Cord Digital power. Connect to digital 1.8V supply.
86,96,
139,179
10,57,58, RESERVED Reserved, unconnected
59,60,61,
62,63,65,
70,135,
155,167
50,73,95 RVDD_33 Ring VDD power. Connect to digital 3.3V supply
52,53,54, N.C. No connected
104,105,
157,158,
159,160,
161,162 
						

							- 39 -INFORMATION OF ICS
IC SAA5264PS/M3/0104 SDIP52
Pin No.    Pin Name Description
1 PWM Output for 14-bit high precision Pulse Width Modulator(PWM)
2 PWM0 Output for 6-bit PWMs 0 to 6
3 PWM1
4 PWM2
5 PWM3
6 PWM4
7 PWM5
8 PWM6
9 ADC0 Inputs for the software Analog-to-Digital-Converter(ADC) facility
   10 ADC1
   11 ADC2
   12 ADC3
   13 VSCC Core ground
   14 SCL(NVRAM) I2
C-bus Serial Clock input to Non-Volatile RAM
   15 SDA(NVRAM) I2
C-bus Serial Data input/output (Non-Volatile RAM)
   16 Input/output for general use
   17 Input/output for general use
   18 Input/output for general use
   19 8mA current sinking capability for direct drive of Light Emitting
   20 Diodes (LEDs)
   21 Input/output for general use
   22 VSSA Analog ground
   23 CVBS0 Composite Video Baseband Signal(CVBS) input; a positive-going
   24 CVBS1 1 V (peak-to peak) input is required; connected via a 100 nF capacitor
   25 SYNC_FILTER Sync-pulse-filter input for CVBS; this pin should be connected to V SSA
via a 100nF capacitor
   26 IREF Reference current input for analog circuits; for correct operation a
24kΩ resistor should be connected to V SSA
   27 FRAME Frame de-interlace output synchronized with the VSYNC pulse to
produce a non-interlaced display by adjustment of the vertical
deflection circuits
   28 TEST Not avallable; connect this pin to V SSA
   29 COR Contrast reduction:open-drain, active LOW output which allows selective
contrast reduction of the TV picture to enhance a mixed mode display
   30 PWM7 Output for 6-bit PWM7
   31 VDDA Analog supply voltage (3.3V)
   32 B Blue colour information pixel rate output
   33 G Green colour information pixel rate output
   34 R Red colour information pixel rate output
   35 VDS Video/data switch push-pull output for pixel rate fast blanking
   36 HSYNC Horizontal sync pulse input: Schmitt triggered for a Transistor Transistor
Lever(TTL) version; the polarity of this pulse is programmable by
register bit TXT1.H POLARITY 
						

							- 40 -IC SAA5264PS/M3/0104 SDIP52
Pin No.
  Pin Name Description
    37 VSYNC Vertical sync pulse input; Schmitt triggered for a TTL version; the
polarity of this pulse is programmable by register bit TXT1. V POLARITY
    38 VSSP Periphery ground
    39 VDDC Core supply voltage (+3.3V)
    40 OSCGND Crystal oscillator ground
    41 XTALIN 12 MHz crystal oscillator input
    42 STALOUT 12 MHz crystal oscillator output
    43 RESET Reset input; if this pin is HIGH for at least 2 machine cycles (24 oscillator
periods) while the oscillator is running, the device resets; this pin
should be connected to V DDP via a capacitor
    44 VDDP Periphery supply voltage (+3.3V)
    45 Input/output for general use
    46 Input/output for general use
    47 Input/output for general use
    48 Input/output for general use
    49 SCL I2
C-bus Serial Clock input from application
    50 SDA I2
C-bus Serial Data input/output (application)
    51 Input/output for general use
    52 Input/output for general useINFORMATION OF ICS
IC  TPA1517NE DIP20
Pin No.
  Pin Name Description
1 IN1                    IN1 is the audio input for channel 1.
2 SGND SGND is the input signal ground reference.
3 SVRR SVRR is the midrail bypass.
4 OUT1 OUT1 is the audio output for channel1.
5 PGND PGND is the power ground reference.
6 OUT2 OUT2 is the audio output for channel 2.
7 VCC VCC  is the supply voltage input.
8 M/SB M/SB is the mute/standby mode enable. When held at less than 2 V,
this signal enables the TPA1517 for standby operation. When held
between 3.5V and 8.2V,this signal enables the TPA1517 for mute
operation. When held above 9.3V, the TPA1517 operates normally.
9 IN2 IN2 in the audio input for channel 2.
  10-20 GND/HS GND/HS are the ground and heatsink connections. All GND/HS
terminals are connected directly to the mount pad for thermal-enhanced
operation.IC  TVP5146PFP S-PQFP-G80 (
Clock Signals)
Pin No.   Pin Name Description
    40 DATACLK Line-locked data output clock.
    74 XTAL1 External clock reference input. it may be connected to an external
oscillator with a 1.8V compatible clock signal or a 14.31818-MHz
crystal oscillator.
    75 XTAL2 External clock reference output. Not connected if XTAL1 is driven by an
external single-ended oscillator. 
						

							- 41 -INFORMATION OF ICS
IC  TVP5146PFP S-PQFP-G80 (Analog Video)
Pin No.   Pin Name Description
    80 VI_1_A
    1 VI_1_B VI_1_x: Analog video input for CVBS/Pb/B/C
    2 VI_1_C VI_2_x: Analog video input for CVBS/Y/G
    7 VI_2_A VI_3_x: Analog video input for CVBS/Pr/R/C
    8 VI_2_B VI_4_x: Analog video input for CVBS/Y
    9 VI_2_C Up to 10 composite, 4 S-video, and 2 composite or 3 component
   16 VI_3_A video input(or a combination thereof) can be supported.
   17 VI_3_B The inputs must be ac-coupled. The recommended coupling
   18 VI_3_C  capacitor is 0.1μF.
   23 VI_4_A The possible input configurations are listed in the input select
 register at I2
C subaddress 00h IC  TVP5146PFP S-PQFP-G80 (
Digital Video)
Pin No.   Pin Name Description
  57,58 C[9:0]/ Digital video output of CbCr, C[9] is MSB and C[0] is LSB. Unused
  59,60, GPIO[9:0] outputs can be left unconnected. Also, these terminals can be
  63,64, programmable general-purpose I/O.
  65,66, For the 8-bit mode, the two LSBs are ignored.
  69,70
    58 D_BLUE Digital BLUE input from overlay device.
    59 D_GREEN Digital GREEN input from overlay device.
    60 D_RED Digital RED input from overlay device.
    57 FSO Fast-switch overlay between digital RGB and any video.
  43,44 Y[9:0] Digital video output of Y/YCbCr, Y[9] is MSB and Y[0] is LSB.
  45,46, For the 8-bit mode, the two LSBs are ignored. Unused outputs
  47,50, can be left unconnected.
  51,52,
  53,54
IC  TVP5146PFP S-PQFP-G80 ( Miscellaneous Signals)
Pin No.   Pin Name Description
    35 FSS/GPIO Fast-switch(blanking) input. Switching signal between the synchronous
component video(YPbPr/RGB) and the composite video input.
Programmable general-purpose I/O
    37 GLCO/I2CA Genlock control output(GLCO). Two Genlock data formats are available:
TI format and real time control(RTC) format.
During reset, this terminal is an input used to program the I 2
C address LSB.
    30 INTREQ Interrupt request
    33 PWDN Power down input:   1=Power down    0=Normal mode
    34 RESETB Reset input, active lowIC  TVP5146PFP S-PQFP-G80 (
Host Interface)
Pin No.   Pin Name Description
    28 SCL I2
C clock input
    29 SDA I2
C data bus 
						

							- 42 -IC  TVP5146PFP S-PQFP-G80 (
Power Supply)
Pin No.    Pin Name Description
    26 AGND Analog ground. Connect to analog ground.
    13 A18GND_REF Analog 1.8-V return
    12 A18VDD_REF Analog power for reference 1.8V
    79 CH1_A18GND
    10 CH2_A18GND Analog 1.8-V return
    15 CH3_A18GND
    24 CH4_A18GND
    78 CH1_A18GND
    11 CH2_A18GND Analog power. Connect to 1.8 V.
    14 CH3_A18GND
    25 CH4_A18GND
     3 CH1_A33GND
     6 CH2_A33GND Analog 3.3-V return
    19 CH3_A33GND
    22 CH4_A33GND
     4 CH1_A33VDD
     5 CH2_A33VDD Analog power. Connect to 3.3 V.
    20 CH3_A33VDD
    21 CH4_A33VDD
27,32,42 DGND Digital return
56,68
31,41,55 DVDD Digital power. Connect to 1.8 V.
67
39,49,62 IOGND Digital power return
38, 48,61 IOVDD Digital power. Connect to 3.3 V or less for reduced noise.
    77 PLL_A18GND Analog power return
    76 PLL_A18VDD Host Interfacewer. Connect to 1.8 V.INFORMATION OF ICS
IC  TVP5146PFP S-PQFP-G80 (Sync Signals)
Pin No.
   Pin Name Description
    72 HS/CS/GPIO Horizontal sync output or digital composite sync output Programmable
general-purpose I/O
    73 VS/VBLK/GPIO Vertical sync output (for modes with dedicated VSYNC) or VBLK
output Programmable general-purpose I/O
    71 FID/GPIO Odd/even field indicator output. This terminal needs a pulldown resistor.
Programmable general-purpose I/O
    36 AVID/GPIO Active video indicator output
Programmable general-purpose I/O 
						

							- 43 -REPLACEMENT PARTS LIST
The following service parts list are available for purchase.
Serviceman may quote the components shown in this page for servicing purposes.
PRODUCT SAFETY NOTE :  Critical parts that have special safety characteristics are identified by a   in
the replacement parts list or the schematic diagrams. Use of any substitute replacement part that does not have
the same safety characteristics as the recommended replacement part in the parts list might create shock, fire
and/or other hazards.
Please do not degrade the safety of this TV through improper servicing.      Cxx-LC880SNT
     15
”   20”
PCB ASSEMBLY
G771-15LB01-01 Control Keys PCB Ass’y
G771-15LB02-01 15” Receiver PCB Ass ’y
G771-15LB03-01 Tuner PCB Ass’y
G771-20LB01-01 Control Keys PCB Ass’y
G771-20LB02-01 20” Receiver PCB Ass ’y
G771-20LB03-01 Tuner PCB Ass’y
G771E15LB01-01 Main PCB Ass’y
G771E20LB01-01 Main PCB Ass’y
G7801-001001 PCB Ass’y Power BL1504015-06A
G7801-002001 PCB Ass’y Power BL2006009-07
SUPPLIED ACCESSORIES
G7101-001001 AC Adaptor SAWA-01-451
G7101-002001 AC Adaptor SAWA-02-521
G7501-001001 Remote Control CLE-968
LCD PANEL
G6203-001001 Display LCD LTM150XH-L06
G6203-002001 Display LCD A20SN02-PV4  Part No.
   Description 
						

							- 44 -PARTS LIST (FOR REFERENCE ONLY)
The components shown in the remaining pages served as a reference only. It is not meant for ordering
of components for servicing purposes. Do not quote any components from these lists.  Item
       Part No. Description        Circuit No.
    1 G1102-001001 COIL FIX C 120K T04 0603 L47
    2 G1102-001002 COIL FIX C 2R7K T04 0603 L34 L35 L36
    3 G1102-002001 COIL FIX C 3R3K  T08  1206 L48 L49 L50
    4 G1107-001001 COIL FIX  33uH  16.5X9   24.5T L15
    5 G1301-001006 CAPACITOR EC V A   SMA 220M C102 C18 C233 C29 C38 C48
16DC T05 4X7 C73 C75 CA1 CA5 CA7 CB10
CB9
    6 G1301-001018 CAPACITOR EC V A  SMA 100M C168 CA50
16DC T05  4X7
    7 G1301-001019 CAPACITOR EC V A  SMA 3R3M CA20
50DC T05  4X7
    8 G1301-001021 CAPACITOR EC V A  SMA 2R2M CA40
50DC T05  4X7
    9 G1301-001024 CAPACITOR EC V A  SMA 100M C12 C13 C14 C3 CA16 CA23
25DC T05  4X7 CA25 CA30 CA31 CA34 CA35
CA48
   10 G1301-001026 CAPACITOR EC V A  SMA 101M C104 C105 C110 C111 C125
16DC T05  6X7 C236 C237 C78 C94 C95 CA54
   11 G1301-001031 CAPACITOR EC V A  SMA 470M CB1
16DC T05  5X7
   12 G1301-001111 CAPACITOR EC V A  SMA 331M C82  C83
16DC T05 8X9
   13 G1301-002015 CAPACITOR EC V A SAII 471M C79 CA13 CA43 CA9
25DC  T05  8X14
   14 G1323-001013 CAPACITOR CE C  TC   CG331J C127 C141 C148 C164 CA32
50DC T04 0603 CA41 CA61 CA65
   15 G1323-001024 CAPACITOR CE C TC  CG150J C169 C170 C171
50DC T04 0603
   16 G1323-001026 CAPACITOR CE C TC   CG330J C117 C118
50DC T04 0603
   17 G1323-001027 CAPACITOR CE C TC   CG470J C229 C230 C231 C232 C76
50DC T04 0603 CA14 CA15 CA51
   18 G1323-001029 CAPACITOR CE C TC   CG221J C46 C47 C55 C64 C66
50DC T04 0603
   19 G1323-001035 CAPACITOR CE C TC   CG220J C88 CA37 CA38
50DC T04 0603
   20 G1323-001038 CAPACITOR CE C TC   CG560J CA18 CA33 CB2 CB3
50DC T04 0603
   21 G1323-001083 CAPACITOR CE C TC   CH5R0J C58 C59
50DC T04 0603 CB4 CB5 CB6 CB7 CB8
MAIN PCB ASSEMBLY 
						

							C15-LC880SNT & C20-LC880SNT
SC No. 0013E    Copyright   Digital Media Systems Group, (2005) All rights reserved